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Texas Instruments LM2592HVSX-ADJ
- Part No.:
- LM2592HVSX-ADJ
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2592HVSX-ADJ.pdf
- Description:
- IC REG BUCK ADJ 2A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,374
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Product details
Overview
LM2592HVSX-ADJ from Texas Instruments is a monolithic nonsynchronous step-down DC-DC converter IC designed for high-voltage input applications, delivering up to 2-A load current with ±4% output voltage accuracy, 150-kHz fixed switching frequency, and input voltage support up to 60 V. It operates as the core regulator in industrial power supplies requiring wide-input, adjustable-output buck conversion.
For engineers reviewing the LM2592HVSX-ADJ datasheet, LM2592HVSX-ADJ pinout, LM2592HVSX-ADJ application, or LM2592HVSX-ADJ equivalent, key selection criteria include its adjustable output range (1.2 V to 57 V), ON/OFF control interface, thermal shutdown protection, 90-μA standby quiescent current, and compatibility with standard 5-pin TO-220 and DDPAK packages.
Technical Context
The LM2592HVSX-ADJ implements a fixed-frequency, current-mode controlled buck topology with internal compensation and a single N-channel DMOS power switch. Its feedback loop senses output voltage via an external resistor divider referenced to the 1.23-V internal reference at the Feedback pin, enabling precise regulation across line and load variations.
It features dual-stage overcurrent protection (peak current limit of 2.4–3.7 A and thermal shutdown at 150°C), undervoltage lockout behavior via the ON/OFF pin, and a dedicated shutdown mode with 90-μA typical quiescent current. The device does not integrate a synchronous rectifier or enable soft-start circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 60 V - supports wide-input industrial and automotive battery-fed systems without pre-regulation. |
| Output Voltage Range | 1.2 V to 57 V (adjustable) - set by external resistor divider; ±4% tolerance ensures stable regulation under full temperature and load conditions. |
| Max Output Current | 2 A DC - delivers sufficient power for mid-power embedded subsystems, sensors, and analog front-ends. |
| Switching Frequency | 150 kHz (±15%) - enables use of compact, low-cost inductors and capacitors while balancing EMI and efficiency. |
| Feedback Reference | 1.23 V (±3%) - defines precision voltage setting point; bias current ≤50 nA minimizes divider error. |
| Quiescent Current | 90 μA in shutdown - reduces system standby power; 5–10 mA in active operation supports efficient light-load performance. |
| Thermal Protection | Junction shutdown at 150°C - prevents permanent damage during overload or poor heatsinking; auto-recovery on cooldown. |
Pinout & Package
LM2592HVSX-ADJ is available in 5-pin TO-220 (NDH) and 5-pin DDPAK/TO-263 (KTT) packages. Both feature identical pin functions and layout-compatible footprints for thermal and mechanical design flexibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VIN | Power Input | Accepts 4.5–60 V DC; requires local low-ESR bypass capacitor to supply high di/dt switching currents and suppress transients. |
| Output | Switch Node | Drives external catch diode and inductor; swings between ~(+VIN − 1.3 V) and ~−0.5 V; must be routed with minimal loop area. |
| Ground | Power & Signal Reference | Common return for input/output capacitors, feedback network, and ON/OFF pull-down; critical for noise immunity and thermal path. |
| Feedback | Regulation Sense | Compares divided output voltage to 1.23-V internal reference; sensitive to noise-requires short trace and optional Schottky clamp if VIN > 40 V. |
| ON/OFF | Digital Control Input | Logic-level shutdown: ≥2 V disables regulator (90 μA IQ); ≤0.6 V or floating enables operation; max 25 V absolute rating. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range Support | Operates from 4.5 V to 60 V - eliminates need for upstream pre-regulators in 24 V/48 V industrial or 12 V–48 V telecom systems. |
| Adjustable Output Precision | 1.23-V ±3% internal reference with ≤50 nA bias current - enables accurate, stable output setting across temperature and load without trimming. |
| Integrated Protection | Two-stage current limiting (2.4–3.7 A peak) plus thermal shutdown - provides robust fault handling without external sensing circuitry. |
| Low Standby Power | 90-μA typical shutdown current - meets stringent energy-saving requirements in always-on or battery-backed applications. |
| Fixed-Frequency Operation | 150-kHz oscillator - simplifies EMI filtering design and allows predictable inductor sizing using standard off-the-shelf magnetics. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: 48 V battery-fed distributed power rail stepping down to 3.3 V or 5 V for microcontrollers and CAN transceivers in heavy-duty vehicle ECUs. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing regulated DC power; no timing or clock generation function. Use Value: Withstands 60 V max input and delivers 2 A continuously, enabling direct connection to truck/bus battery systems without transient clamping stages. | Use Scenario: On-board 12 V-to-5 V conversion for infotainment head unit logic rails where space and thermal constraints limit heatsink size. IC Role / Device Role / Timing Role: High-efficiency step-down converter supplying stable 5 V to FPGA I/O banks and USB PHYs. Use Value: 81% typical efficiency at 12 VIN/5 VOUT/2 A reduces thermal load; TO-220 package allows direct mounting to chassis for passive cooling. |
| Programmable Logic Controller (PLC) I/O Module | Test & Measurement Equipment |
Use Scenario: Field-side power conditioning in modular PLC backplanes requiring configurable 12 V, 15 V, or 24 V outputs from a common 48 V bus. IC Role / Device Role / Timing Role: Adjustable-output buck regulator supporting multiple voltage configurations via resistor selection. Use Value: 1.2–57 V output range and ±4% regulation accuracy allow single BOM variant to serve diverse I/O module voltage needs. | Use Scenario: Precision analog subsystem power in portable oscilloscopes or signal generators needing low-noise, stable 3.3 V for ADCs and DACs. IC Role / Device Role / Timing Role: Pre-regulator feeding low-dropout linear regulators to achieve ultra-low ripple and high PSRR. Use Value: 150-kHz switching frequency permits effective post-filtering; 90-μA shutdown current preserves battery life during standby modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596HV-ADJ | Higher 3-A output current, same 60 V input, but 150-kHz frequency and TO-220/DDPAK packaging; slightly higher quiescent current (10 mA active). | Better suited for higher-current loads; less optimal for space-constrained layouts due to larger thermal footprint at 3 A. | Select when >2 A output is required and board area allows larger heatsinking. |
| TPS54202DRT | Synchronous 2-A buck with 4.5–28 V input, 500 kHz switching, integrated MOSFETs, and enable/PG pins; no external diode needed. | Superior efficiency at light loads and smaller solution size, but limited to ≤28 V input-unsuitable for 48 V+ systems. | Select for lower-voltage, high-density designs where synchronous efficiency and footprint matter more than input voltage range. |
Compared with LM2592HVSX-ADJ, LM2596HV-ADJ offers higher current capacity at the cost of increased thermal demand, while TPS54202DRT trades input voltage range for integration and efficiency-making LM2592HVSX-ADJ the optimal choice for ruggedized 48–60 V industrial buck conversion where simplicity and proven reliability are prioritized.
Availability
LM2592HVSX-ADJ is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, programmable logic controller modules, and test equipment requiring stable component supply with long lifecycle assurance.
Supply support for LM2592HVSX-ADJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2592HV family was engineered for rugged, wide-input industrial and transportation applications where simplicity, thermal robustness, and long-term manufacturability outweigh advanced feature sets like synchronization or digital control.
FAQ
What is the maximum input voltage rating for LM2592HVSX-ADJ?
The LM2592HVSX-ADJ has an absolute maximum input voltage rating of 63 V, with recommended operating range from 4.5 V to 60 V. Exceeding 60 V in continuous operation risks violating thermal and electrical limits; transient spikes above 63 V may cause permanent damage per the Absolute Maximum Ratings table in the TI datasheet SNVS075E.
How do I set the output voltage for LM2592HVSX-ADJ?
The output voltage of LM2592HVSX-ADJ is set using a two-resistor feedback divider connected between VOUT, FB, and GND. With a 1.23-V internal reference, VOUT = 1.23 × (1 + R1/R2). TI recommends R1 ≈ 1 kΩ and 1% tolerance resistors for stability; values must be selected to ensure FB pin bias current (<50 nA) introduces negligible error.
Does LM2592HVSX-ADJ require an external catch diode?
Yes, LM2592HVSX-ADJ requires an external Schottky catch diode (e.g., 3.3-A, 60-V rated) connected from the Output pin to GND. This diode provides the inductor's freewheeling path during switch-off. TI specifies fast recovery or Schottky types to minimize conduction loss and prevent instability-no internal synchronous rectifier is present in the LM2592HVSX-ADJ.
What thermal considerations apply to LM2592HVSX-ADJ in TO-220 package?
In the NDH (TO-220) package, LM2592HVSX-ADJ has a junction-to-ambient thermal resistance (RθJA) of 50°C/W on a standard JEDEC 4-layer board. To maintain TJ ≤125°C at 2 A load, ambient temperature must stay below ~75°C with adequate copper pour and optional heatsink; derating is required above 85°C ambient per TI's thermal curves in SNVS075E.
Can LM2592HVSX-ADJ be used in a negative-output (inverting) configuration?
Yes, LM2592HVSX-ADJ can be configured as a positive-to-negative inverter by bootstrapping the GND pin to the negative output rail and referencing the FB pin to that rail. TI provides Figure 24 in SNVS075E showing this topology; maximum |VIN| + |VOUT| must remain ≤60 V, and additional isolation diodes (e.g., Schottky) are required to maintain stability and prevent input ripple coupling.
LM2592HVSX-ADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 57V
- Current - Output:
- 2A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LM2592HVSX-ADJ FAQ
1.How can I place an order for LM2592HVSX-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2592HVSX-ADJ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM2592HVSX-ADJ reliable?
The price and inventory of LM2592HVSX-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2592HVSX-ADJ is usually 5 days.
3.What payment methods are accepted for LM2592HVSX-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2592HVSX-ADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2592HVSX-ADJ?
LM2592HVSX-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2592HVSX-ADJ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM2592HVSX-ADJ?
For technical support, including LM2592HVSX-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2592HVSX-ADJ requirements.
6.How does Aetrix verify that LM2592HVSX-ADJ is sourced from the original manufacturer or authorized distributors?
All LM2592HVSX-ADJ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2592HVSX-ADJ meets industry standards.
7.What is the process for return or replacement of LM2592HVSX-ADJ?
All LM2592HVSX-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM2592HVSX-ADJ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM2592HVSX-ADJ part is unused and in its original packaging.
Return procedure for LM2592HVSX-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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